Fix Qt6 deprecation warning about QString::fromUcs4

[lyx.git] / src / Undo.h

diff --git a/src/Undo.h b/src/Undo.h
index 8b482d2582446c13d1399a1997284b712051e7d3..887f7627e1d54854800a34c00678971f77d1f63e 100644 (file)
--- a/src/Undo.h
+++ b/src/Undo.h
@@ -22,11 +22,8 @@
 namespace lyx {
 
 class Buffer;
-class BufferParams;
 class CursorData;
 class Inset;
-class MathData;
-class ParagraphList;
 
 /// This is used to combine consecutive undo recordings of the same kind.
 enum UndoKind {